/*
Copyright 2021 The KodeRover Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package mongodb

import (
	"context"
	"errors"
	"fmt"
	"time"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"

	"github.com/koderover/zadig/pkg/microservice/aslan/config"
	"github.com/koderover/zadig/pkg/microservice/aslan/core/common/repository/models"
	"github.com/koderover/zadig/pkg/setting"
	mongotool "github.com/koderover/zadig/pkg/tool/mongo"
)

type WorkflowV4Coll struct {
	*mongo.Collection

	coll string
}

type ListWorkflowV4Option struct {
	ProjectName string
	DisplayName string
	Names       []string
	Category    setting.WorkflowCategory
}

func NewWorkflowV4Coll() *WorkflowV4Coll {
	name := models.WorkflowV4{}.TableName()
	return &WorkflowV4Coll{
		Collection: mongotool.Database(config.MongoDatabase()).Collection(name),
		coll:       name,
	}
}

func (c *WorkflowV4Coll) GetCollectionName() string {
	return c.coll
}

func (c *WorkflowV4Coll) EnsureIndex(ctx context.Context) error {
	mod := []mongo.IndexModel{
		{
			Keys: bson.D{
				bson.E{Key: "project", Value: 1},
				bson.E{Key: "name", Value: 1},
			},
			Options: options.Index().SetUnique(true),
		},
		{
			Keys: bson.D{
				bson.E{Key: "project", Value: 1},
				bson.E{Key: "display_name", Value: 1},
			},
			Options: options.Index().SetUnique(false),
		},
	}
	_, err := c.Indexes().CreateMany(ctx, mod)

	return err
}

type WorkflowV4 struct {
	Name        string `json:"name"`
	ProjectName string `json:"projectName"`
}

type ListWorkflowV4Opt struct {
	Workflows []WorkflowV4
}

func (c *WorkflowV4Coll) ListByWorkflows(opt ListWorkflowV4Opt) ([]*models.WorkflowV4, error) {
	var res []*models.WorkflowV4

	if len(opt.Workflows) == 0 {
		return nil, nil
	}
	condition := bson.A{}
	for _, workflow := range opt.Workflows {
		condition = append(condition, bson.M{
			"name":    workflow.Name,
			"project": workflow.ProjectName,
		})
	}
	filter := bson.D{{"$or", condition}}
	cursor, err := c.Collection.Find(context.TODO(), filter)
	if err == mongo.ErrNoDocuments {
		return nil, nil
	}
	if err != nil {
		return nil, err
	}
	if err := cursor.All(context.TODO(), &res); err != nil {
		return nil, err
	}
	return res, nil
}

func (c *WorkflowV4Coll) ListByProjectNames(projects []string) ([]*models.WorkflowV4, error) {
	resp := make([]*models.WorkflowV4, 0)
	query := bson.M{}
	if len(projects) != 0 {
		if len(projects) != 1 || projects[0] != "*" {
			query = bson.M{"project": bson.M{
				"$in": projects,
			}}
		}
	} else {
		return resp, nil
	}
	cursor, err := c.Collection.Find(context.TODO(), query)
	if err != nil {
		if err == mongo.ErrNoDocuments {
			return nil, nil
		}
		return nil, err
	}
	err = cursor.All(context.TODO(), &resp)
	if err != nil {
		return nil, err
	}

	return resp, nil
}

func (c *WorkflowV4Coll) BulkCreate(args []*models.WorkflowV4) error {
	if len(args) == 0 {
		return nil
	}
	var ois []interface{}
	for _, arg := range args {
		arg.CreateTime = time.Now().Unix()
		arg.UpdateTime = time.Now().Unix()
		arg.UpdateHash()
		ois = append(ois, arg)
	}

	_, err := c.InsertMany(context.TODO(), ois)
	return err
}

func (c *WorkflowV4Coll) Create(obj *models.WorkflowV4) (string, error) {
	if obj == nil {
		return "", fmt.Errorf("nil object")
	}

	obj.UpdateHash()

	res, err := c.InsertOne(context.TODO(), obj)
	if err != nil {
		return "", err
	}
	ID, ok := res.InsertedID.(primitive.ObjectID)
	if !ok {
		return "", errors.New("failed to get object id from create")
	}
	return ID.Hex(), err
}

func (c *WorkflowV4Coll) Count() (int64, error) {
	query := bson.M{}

	ctx := context.Background()
	count, err := c.Collection.CountDocuments(ctx, query)
	if err != nil {
		return 0, err
	}

	return count, nil
}

func (c *WorkflowV4Coll) List(opt *ListWorkflowV4Option, pageNum, pageSize int64) ([]*models.WorkflowV4, int64, error) {
	resp := make([]*models.WorkflowV4, 0)
	query := bson.M{}
	if opt.ProjectName != "" {
		query["project"] = opt.ProjectName
	}
	if opt.DisplayName != "" {
		query["display_name"] = opt.DisplayName
	}
	if len(opt.Names) > 0 {
		query["name"] = bson.M{"$in": opt.Names}
	}
	if opt.Category != "" {
		query["category"] = opt.Category
	}
	count, err := c.CountDocuments(context.TODO(), query)
	if err != nil {
		return nil, count, err
	}
	var findOption *options.FindOptions
	if pageNum == 0 && pageSize == 0 {
		findOption = options.Find()
	} else {
		findOption = options.Find().
			SetSkip((pageNum - 1) * pageSize).
			SetLimit(pageSize)
	}

	cursor, err := c.Collection.Find(context.TODO(), query, findOption)
	if err != nil {
		return nil, count, err
	}
	err = cursor.All(context.TODO(), &resp)
	if err != nil {
		return nil, count, err
	}
	return resp, count, nil
}

func (c *WorkflowV4Coll) Find(name string) (*models.WorkflowV4, error) {
	resp := new(models.WorkflowV4)
	query := bson.M{"name": name}

	err := c.FindOne(context.TODO(), query).Decode(&resp)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *WorkflowV4Coll) GetByID(idstring string) (*models.WorkflowV4, error) {
	resp := new(models.WorkflowV4)
	id, err := primitive.ObjectIDFromHex(idstring)
	if err != nil {
		return nil, err
	}
	query := bson.M{"_id": id}

	err = c.FindOne(context.TODO(), query).Decode(&resp)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *WorkflowV4Coll) Update(idString string, obj *models.WorkflowV4) error {
	if obj == nil {
		return fmt.Errorf("nil object")
	}
	id, err := primitive.ObjectIDFromHex(idString)
	if err != nil {
		return fmt.Errorf("invalid id")
	}
	obj.UpdateHash()
	filter := bson.M{"_id": id}
	update := bson.M{"$set": obj}

	_, err = c.UpdateOne(context.TODO(), filter, update)
	return err
}

func (c *WorkflowV4Coll) DeleteByID(idString string) error {
	id, err := primitive.ObjectIDFromHex(idString)
	if err != nil {
		return err
	}
	query := bson.M{"_id": id}

	_, err = c.DeleteOne(context.TODO(), query)
	return err
}

func (c *WorkflowV4Coll) ListByCursor(opt *ListWorkflowV4Option) (*mongo.Cursor, error) {
	query := bson.M{}
	if opt.ProjectName != "" {
		query["project"] = opt.ProjectName
	}
	if opt.DisplayName != "" {
		query["display_name"] = opt.DisplayName
	}
	if len(opt.Names) > 0 {
		query["name"] = bson.M{"$in": opt.Names}
	}
	return c.Collection.Find(context.TODO(), query)
}
